Roller side bearing.



1. F. oCoNNoR.

ROLLER SIDE BEARING.

APPLICATION man JuLvl, 191s.

Patented J an. 7, 1919.

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WITNESSES'.' V @MW N 1 www@ j. F. O'CONNOR.

ROLLER SIDE BEARING.

APPLICATION man xuLY l. 191s.

Patented Jan. 7, 1919.

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WITNESSES;

mounted tain conditions is extremely severe -ments in connection UNITED `sra'rEs PATENT oEEioE.

noLLEEsInE BEARING.

To all whom z't may concern.' Be it known that I, JOHN citizen of the United States, residin Chicago, in the county of Cook and F.0CONNOR, a at tate of Illinois, have Ainvented 'a certain new and `useful Improvement in Roller Side `Bearings, of which the following is a full, clear, concise, and exact description, reference being had to `the accomp'anging drawings, forming a" part of this speci catlon.

rlFhis invention relates to improvements 1n roller sidey bearings.

' lln railway operation, it has been common to employ-aside bearing for vcars wherein 1s employed a roller carrying about trunnions supported? 1n a base casting, the cradle being oscillatable so as to' .automatically adjust itself to varying conditions of service. In some cl'assesbf service, as for instance in' thetransportation ofV coal and ore Where thecapacity of the cars now approximates 70 to 100 tons, the load applied on the side bearings under JI cer- `o en timesamounting to scores of tons.` ilhe result has been that the enormous pressure ap plied to the anti-friction rollers has caused the cradles to bend as a bridge bends under severe load applied at the center thereof,the

cradle thereby collapsing between the trunnions to such an extent that the-end walls are brought together` and ultimatelyclamp the anti-friction roller therebetween so that the roller cannot perform its proper function. o One object of my 4invention is to provide a roller side bearing of the general type above indicated, that is, one employinga cradle mounted on trunnions, so arrangedthat" the trunnions are relieved of a greater part of the severe loads heretofore encountered.

' Another and more specific object Vof the invention is to provide a roller side bearing of the generaltype'above indicated wherein the old base castings or retainingl members may be remployed without modification, thereby eifecting a large saving to the rail- `rroads that are required to loads. Y lin the drawing forming a part of this specication', Figure 1 is a vertical, sectional view of a side bearing showing my improvetherewith, the section extending `lengthwise of the car, that is,

specification of Letters Patent.

change their side Y bearings to 'withstand the present increased transversely of the bolsters. Fig. 2 is a vertlcal, sectional view,taken substantially on the line Z-jZJOFig. l. Fig. 3 is a detail, perspective ofv the bearing block insert shown in Figs. 1 and 2. Figs. 1, 2 and 3 trated in `1gs.`1 to `3, 10 denotesthe upper wall of a truck bolster and 11 the `under side of a bodybolster. The improved side `bearing` is shown applied to the truck bolster wlththe .anti-friction roller adapted to engage the body bolster..

As shown, the improved side bearing comprises,

broadly, abase or retaining castin A, a cradle"B,-an anti-friction roller C,`.au 80 an auxiliaryfbearing block insertD.

The basecasting `A is of substantially rectangular formation havin vertical spaced side walls 12-12, end wal s 1313, the' latter being formed on their` interior with enlargements14--14 having journal orv trun nion bearings 15--15 at their tops, and

`flanges or ears 16 b which the casting is adapted to be rivete to the truck bolster.

`The cradle B is of substantially rectangular hollow box-like form havin end walls 17--17 provided with integra trunnions 18-18, and side walls 19--19.

- The anti-friction roller C is of cylindrical Patented Jan. '7., 1919. Application filed July 1, 1918. Serial No. 242,822. i i

form and rotatably mounted on a journal or axle. 20,`the ends of which are seated inthe sidewalls 15J-19 of the cradle and prevented from rotation with respect thereto in any suitable manner. Y

In order to relieve the-cradle of the severe `bending strains heretofore encountered, the

end walls 17-`-17 of the cradleare extended downwardly so as to provide circular flanges 21-`21 at the ends of the cradle and between the enlargements 14-14 of the base casting.- Coperable with the circular anges 21 of the cradle are corresponding curved bearing surfaces 2.2-22 formed on the upper face of the insert D. The insert D is of substantially rectangular formation .and is inserted in the base casting A as clearly illustrated in the drawing. To save metal, the cradle D is cutaway at its center, as indicated at 23, and is preferably recessed on its under side, as indicated at 24-24, in alinement with the openings 25-25 of the base casting so as to permit dirt .and other foreign matter to be readily washed out, In addition, the insert D is grooved at opposite sides thereof as indicated at 26-26 in order to provide suiicient clearance for any projecting portions of the journal 20.

With the construction above described, it is evident that pressure transmitted to the anti-friction roller Ais in turn transmitted to the vertical end walls 17-17 of the cradle, thus placing said end walls 17 under compression. The pressure is in turn transmitted from the end walls 17 -to the insert D and the latterplaced under compression. As will be understood, the curved bearing suri faces on the end walls 17 of the cradle and on the insert D are made concentric with the trunnions 18. With the construction shown, the trunnions may take part of the load and the auxiliary bearing surfaces a part' also and I thereby obtain a side bearing having friction roller.

the advantages of a rocking cradle but with-- out danger of the end walls 17--17 of the cradle being forced inwardly toward each other with resultantl clamping of the anti- I am also enabled to remploy the well known base casting shown in the drawing with consequent saving to the railroads.

In the construction shown in Figs. 4 and 5, the arrangement of cradle and anti-friction roller is the same as in the other figures.

AIn this construction, however, thel base casting A is of special formation and has the a'base member having trunnion bearings,

of a cradle having trunnions mounted in said bearings and thereby adapting the cradle for rocking movement, an anti-friction roller mounted in said cradle, said cradle having auxiliary bearing surfaces curvedy concentrically with said trunnions,

f and curved bearingsurfaces coperable with said auxiliary bearing surfaces of the cradle.

2. In a side bearing, the combination with a base member having trunnion bearings, of a cradle having trunnions mountedl in said bearings and thereby adapting the cradle for rocking movement, an antifriction roller mounted in said cradle, said cradle having auxiliary bearing surfaces curved colicentrically with said trunnions and curved bearmg surfaces coperable wit said auxiliary bearlng surfaces of the cradle, said bearing surfaces which coperate with those of the cradle being formed integrally with the base member.

3. In a side bearing, the combination with a hollow base member, of a cradle having trunnions mounted in bearings provided in the base member, an anti-friction roller supported by the cradle, and a block inserted Within the base member at the bottom thereof, said block being provided with upper curved bearing surfaces concentric with the axes 'of said trunnions, said cradle having depending flanges provided with curved bearing surfaces coperable with those of said insert block. i

4. In a side bearing, the combination with a base member having trunnion bearings, of a hollow box-like cradle having trunnions at its ends seated in said bearings and thereby adapting the cradle to rock, of an anti-friction roller rotatablv mounted within said cradle, the end walls of said cradle being extended below the trunnions and provided with curved bearing surfaces concentric with the axes of the. trunnions, and coperating bearing surfaces.

5. As an article of manufacture, a roller carrying cradle for side bearings, said cradle comprlsing a hollow substantially box-like member having trunnions formed on the outer sides of the end walls thereof, an axle having its ends mounted in the side walls of said cradle, an anti-friction roller rotatably mounted on said axle, the end walls of said cradle being extended and having their edges curved concentrically with the axes of the trunnions to thereby provide auxiliary bearings for the cradle.

6. In a side bearing for railway cars and the like, the combination with a hollow base casting of substantially rectangular formation, said base casting being provided on its interior with cylindrical curved bearing surfaces, of a cradle having side and end walls, the end walls of said cradle being rounded on their bottom faces to coperate with said cylindrical bearing surfaces of the base casting and thereby adapting the cradle to rock within the base casting; an anti friction roller supported by the side walls of said cradle; and studs formed on the outer sides of the end walls of said cradle, said base casting having its end Walls provided with recesses adapted to accommodate said lugs and permit said rocking movement of the cradle.

In witness that I claim the foregoing I have hereunto subscribed myiname this 15th day of June, 1918.

, JOI-IN F. OCONNOR. 

